[Autonomic control and functional condition of suprasegmental structures of the brain in patients with heart rhythm disorders and vasculo-autonomic dystonia].

A study was made by the method of combination of electroencephalography (EEG) and variational pulsimetry in 157 patients to determine the background vegetative tone and that very tone during conducting functional tests aimed at activating of sympathetic and parasympathetic portions of the nervous system. Criteria have been established characterizing the vegetative tone. Particular features are described of changes in the power of the EEG wave spectra while conducting tests in those groups being different in their baseline vegetative tone.

[Sudden cardiac death: the possible role of latent myocardial ischemia in the mechanisms of its formation and development].

An analysis was performed of comprehensive (non-invasive and invasive) observations of IHD patients presenting with atherosclerotic lesions of coronary arteries of the heart and atypical clinical picture of the condition. A possibility was shown of a significant obstruction of arteries of the heart in atypical localization of pain and in those patients who had not derived much benefit from nitroglycerin during the development of ischemia and measures instituted against it. Inadequate reaction to nitroglycerin may be explained by specificities of changes in the vegetative nervous system, by the hemodynamics reaction, and, in the first place, by a propensity for developing tachycardia under physical loading, emotional stress, and after ingestion of nitroglycerin.

[Ambulatory transesophageal cardiac electrostimulation and daily Holter cardiac monitoring of patients with a heart rhythm disorder].

Sixty-eight patients with different disorders of the cardiac rhythm were examined in ambulatory conditions. The complex of noninvasive examinations included: echocardiography, Holter monitoring, bicycle ergometry [correction of veloergometry] and transesophageal cardiostimulation with performance of diagnostic and pharmacological tests. The obtained data permitted to evaluate disorders of automatism and conduction at different levels of the cardiac conduction system, to identify paroxysmal tachyarrhythmia and realize selection of antiarrhythmic agents.